How to Fix Windows Security 404 Not Found Error
If you see a '404 Not Found' error when opening Windows Security (formerly Windows Defender), the...
Checklists for software errors, setup, and tool workflows.
1. Reproduce
2. Isolate
3. Apply
4. Verify
Latest checklists
View listHow to Fix High Memory Usage by Command Prompt (cmd.exe)
You open Task Manager and see that Command Prompt (cmd.exe) is using 500 MB or more of RAM. That'...
PowerShell Service Unavailable: Quick Troubleshooting Checklist
When you see a 'PowerShell service unavailable' error, it usually means PowerShell cannot connect...
Fix BitLocker Auto-Unlock Permission Denied Error
You've encrypted a drive with BitLocker and want to enable auto-unlock so you don't have to enter...
Fix Windows Security Offline Installer Sync Issues
If your Windows Security offline installer fails to sync or update, you may see errors like "Sync...
How to Fix Windows Activation Network Error
You try to activate Windows and see an error like “We can’t activate Windows on this device becau...
Topic paths
Quick titles
Fix 'python' Not Recognized in Command PromptResolve OneDrive Sync Problems Caused by Windows UpdateTask Scheduler 504 Gateway Timeout FixChrome Profile Missing After Update? Here's How to Fix ItHow to Set Up PowerShell for Office 365 MigrationHow to Fix Windows Terminal Certificate Trust IssuesResolving DNS_PROBE_FINISHED_BAD_CONFIG on Windows and MacHow to Locate Chrome Profile Log File